﻿//-----------------------------------------------------------------------
// <copyright file="TasksManager.cs" company="OOHM PROCESSAMENTO DE DADOS LTDA.">
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//-----------------------------------------------------------------------
namespace AbstractSaaSTemplate.Robots.Jobs{    using System;
    using System.Collections.Generic;
    using AbstractSaaSTemplate.Application.Configuration;
    using AbstractSaaSTemplate.Kernel;
    using AbstractSaaSTemplate.Kernel.Factories;
    using AbstractSaaSTemplate.Robots.Jobs.Tasks;
    using OOHM.Framework.Configuration;
    using OOHM.Framework.Security.Cryptography;

    /// <summary>
    /// Manages the instances of services so that we can run several of them at once.
    /// This class also encapsulates jobs management, allowing you to extend its
    /// usage to environments that do not necessarely accept a Windows Service installation.
    /// </summary>
    public sealed class TasksManager
    {
        /// <summary>
        /// Initializes a new instance of the TasksManager class.
        /// </summary>
        public TasksManager()
        {
            // initializes the framework context
            InitializeFrameworkContext();
            
            // initializes the factory to create the tasks
            var factory = new ApplicationFactory();

            // here we shall load all the tasks (jobs)
            // that will be continuously run by this task
            // manager within the scope of the service.
            this.Tasks = new TaskBase[]
            {
                factory.CreateTaskFor<MultipleMessagesDispatcher>(),
            };
        }

        /// <summary>
        /// Gets or sets the list of tasks which are expected to run.
        /// </summary>
        private IEnumerable<TaskBase> Tasks { get; set; }

        /// <summary>
        /// Perfroms all tasks once.
        /// </summary>
        public void RunOnce()
        {
            if (this.Tasks == null)
            {
                return;
            }

            foreach (var task in this.Tasks)
            {
                task.Run();
            }
        }

        /// <summary>
        /// Initializes the context of OOHM Framework (Configurator and Cypher)
        /// </summary>
        private static void InitializeFrameworkContext()
        {
            // Retrieves the very basic configuration info
            var appId = ConfigurationLoader.GetApplicationId();
            var configurationFilePath = ConfigurationLoader.GetConfigurationFilePath();

            // Initializes the Configurator from OOHM.Framework.Configuration
            // can only initialize the Configurator if the raw application settings
            // are properly defined in the web.config
            if (!Configurator.Initialized &&
                appId != Guid.Empty &&
                !string.IsNullOrWhiteSpace(configurationFilePath))
            {
                Configurator.InitializeService(appId, configurationFilePath);
            }

            // Initializes the Cypher from OOHM.Framework.Security
            // can only initialize the cypher if the configurator is initiated.
            if (Configurator.Initialized)
            {
                var passphrase = Configurator.GetConfigurationByKey<string>(ConfigurationKeys.EncryptionParaphrase);
                if (!Cypher.Initialized && !string.IsNullOrWhiteSpace(passphrase))
                {
                    Cypher.InitializeService(passphrase);
                }
            }
        }
    }
}


